Edge Connector, Circuit Board, and Connector Component

ABSTRACT

An edge connector includes a first row of golden fingers and a second row of golden fingers. The first row of golden fingers is adjacent to a plugging end of the edge connector, and the second row of golden fingers is adjacent to the first row of golden fingers. In a plugging direction of the edge connector, each golden finger in the first row of golden fingers has a first end proximate to the plugging end and a second end opposite to the first end. A first end of a grounded golden finger in the first row of golden fingers is protruded from other golden fingers, and second ends of two or more than two golden fingers in the first row of golden fingers are not aligned with each other.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of international patentapplication number PCT/CN2017/086167 filed on May 26, 2017, which claimspriority to Chinese patent application number 201610383948.9 filed onJun. 1, 2016. The disclosures of the aforementioned applications arehereby incorporated by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the field of communicationstechnologies, and in particular, to an edge connector, a circuit board,and a connector component.

BACKGROUND

As communications modules have an increasingly smaller size and anincreasingly larger capacity, it is a simple and feasible method toincrease a communication rate by increasing a quantity of channels. Anedge connector is a frequently used connector. Such a connector has thefeature, a golden finger is in contact with a contact spring plate in apeer female connector to transmit a signal between the edge connectorand the female connector. Edge connectors currently used in the industrymostly include a single row of golden fingers. The single row of goldenfingers includes a relatively small quantity of channels, andconsequently an edge connector using a single row of golden fingers hasa relatively low communication rate. To resolve this technical problem,skilled persons have carried out studies on use of an edge connectorincluding double rows of golden fingers. However, the studies show thatthe edge connector including double rows of golden fingers has problemssuch as surge overshoot and current backflow, eventually leading to ashortened life span of the edge connector.

SUMMARY

An objective of the present disclosure is to provide an edge connectorin order to prolong a life span of the edge connector to some extent.

According to a first aspect, this application provides an edgeconnector, including a base and a first row of golden fingers and asecond row of golden fingers, where the first row of golden fingers andthe second row of golden fingers are disposed in parallel on a surfaceof the base, the first row of golden fingers is adjacent to a pluggingend of the edge connector, and the second row of golden fingers isadjacent to the first row of golden fingers, the first row of goldenfingers includes a plurality of golden fingers that are disposed inparallel and isolated from each other, and the second row of goldenfingers includes a plurality of golden fingers that are disposed inparallel and isolated from each other, where the golden finger iselectrically connected to a circuit inside the base, in a pluggingdirection of the edge connector, each golden finger in the first row ofgolden fingers has a first end that is close to the plugging end and asecond end that is opposite to the first end, a first end of a groundedgolden finger in the plurality of golden fingers in the first row ofgolden fingers is protruded from other golden fingers, and second endsof two or more than two golden fingers in the first row of goldenfingers are not aligned with each other, and a first end that is of agrounded golden finger in the second row of golden fingers and that isclose to the plugging end in the plugging direction of the edgeconnector is protruded from other golden fingers.

That “a first end of a grounded golden finger in the first row of goldenfingers is protruded from other golden fingers” is to ensure that firstends of the plurality of golden fingers in the first row of goldenfingers are not aligned with each other. That “a first end that is of agrounded golden finger in the second row of golden fingers and that isclose to the plugging end in the plugging direction of the edgeconnector is protruded from other golden fingers” is to ensure thatfirst ends of the plurality of golden fingers in the second row ofgolden fingers are not aligned with each other. In this application, thefirst ends of the plurality of golden fingers in the first row of goldenfingers are set to be not aligned with each other, second ends of theplurality of golden fingers in the first row of golden fingers are setto be not aligned with each other, and the first ends of the pluralityof golden fingers in the second row of golden fingers are set to be notaligned with each other to avoid a possible problem, in a process inwhich the edge connector is plugged into/out of a female connectorthrough hot plug, of simultaneous power-on or power-off of any row ofthe first row of golden fingers or the second row of golden fingers, andfurther avoid problems such as surge overshoot and current backflowcaused when golden fingers in a same row are simultaneously powered onor powered off such that a life span of the edge connector can beprolonged to some extent.

With reference to the first aspect, in a first possible implementation,a second end of the grounded golden finger in the first row of goldenfingers is protruded from the other golden fingers.

It should be noted that the other golden fingers are golden fingersother than the grounded golden finger in the first row of goldenfingers. The grounded golden finger is the longest compared with theother golden fingers in the first row of golden fingers. Therefore, theforegoing limitation helps reduce a surface area, occupied by the firstrow of golden fingers, of the base of the edge connector, therebyfacilitating miniaturization of the edge connector.

With reference to the first aspect or the first possible implementationof the first aspect, in a second possible implementation. In addition tothe grounded golden finger, the first row of golden fingers furtherincludes a golden finger for transmitting a power signal, a distancethat is in the plugging direction of the edge connector and that isbetween a reference line and the second end of the grounded goldenfinger in the first row of golden fingers is greater than a distancethat is in the plugging direction of the edge connector and that isbetween the reference line and a second end of the golden finger fortransmitting a power signal in the first row of golden fingers, thedistance that is in the plugging direction of the edge connector andthat is between the reference line and the second end of the goldenfinger for transmitting a power signal in the first row of goldenfingers is greater than or equal to a distance that is in the pluggingdirection of the edge connector and that is between the reference lineand a second end of a golden finger for transmitting a communicationsignal in the first row of golden fingers, and the reference line isperpendicular to the plugging direction of the edge connector, anddivides each golden finger in the first row of golden fingers into twoparts.

A length of the grounded golden finger in the plugging direction of theedge connector is greater than a length, in the plugging direction ofthe edge connector, of the golden finger for transmitting a powersignal. The length, in the plugging direction of the edge connector, ofthe golden finger for transmitting a power signal is greater than alength, in the plugging direction of the edge connector, of the goldenfinger for transmitting a communication signal. Therefore, in thisapplication, it is ensured that the distance between the reference lineand the second end of the grounded golden finger in the first row ofgolden fingers is greater than the distance between the reference lineand the second end of the golden finger for transmitting a power signalin the first row of golden fingers, and that the distance between thereference line and the second end of the golden finger for transmittinga power signal in the first row of golden fingers is greater than thedistance between the reference line and the second end of the goldenfinger for transmitting a communication signal in the first row ofgolden fingers to reduce a surface area, occupied by the first row ofgolden fingers, of the base of the edge connector, thereby facilitatingminiaturization of the edge connector.

With reference to the second possible implementation of the firstaspect, in a third possible implementation, a distance that is in theplugging direction of the edge connector and that is between thereference line and the first end of the grounded golden finger in thefirst row of golden fingers is greater than a distance that is in theplugging direction of the edge connector and that is between thereference line and a first end of the golden finger for transmitting apower signal in the first row of golden fingers, and the distance thatis in the plugging direction of the edge connector and that is betweenthe reference line and the first end of the golden finger fortransmitting a power signal in the first row of golden fingers isgreater than a distance that is in the plugging direction of the edgeconnector and that is between the reference line and a first end of thegolden finger for transmitting a communication signal in the first rowof golden fingers.

In the foregoing technical solution, in a process of powering on theplurality of golden fingers in the first row of golden fingers, thegrounded golden finger can be powered on before the golden finger fortransmitting a power signal, and the golden finger for transmitting apower signal can be powered on before the golden finger for transmittinga communication signal, and in a power-off process, the golden fingerfor transmitting a communication signal can be powered off before thegolden finger for transmitting a power signal, and the golden finger fortransmitting a power signal can be powered off before the groundedgolden finger. In the foregoing technical solution, the grounded goldenfinger is the first to be powered on and the last to be powered off toensure security of the first row of golden fingers, and avoid life spanshortening of the edge connector caused by a problem such as surgeovershoot. The golden finger for transmitting a power signal is poweredon before the golden finger for transmitting a communication signal, andis powered off after the golden finger for transmitting a communicationsignal, to ensure that the golden finger for transmitting acommunication signal can integrally transmit a signal, and avoid aproblem that a signal transmitted on the golden finger for transmittinga communication signal is lost because the golden finger fails to bepowered on in time.

With reference to the second or the third possible implementation of thefirst aspect, in a fourth possible implementation, the reference linedivides a shortest golden finger in the first row of golden fingers intotwo parts of a same length in the plugging direction of the edgeconnector. Therefore, the surface area, occupied by the first row ofgolden fingers, of the base of the edge connector can be furtherreduced, thereby facilitating miniaturization of the edge connector.

With reference to any one of the first aspect or the first to the fourthpossible implementations of the first aspect, in a fifth possibleimplementation, the second row of golden fingers further includes agolden finger for transmitting a power signal, a distance that is in theplugging direction of the edge connector and that is between a referenceline and the first end of the grounded golden finger in the second rowof golden fingers is greater than a distance that is in the pluggingdirection of the edge connector and that is between the reference lineand a first end of the golden finger for transmitting a power signal inthe second row of golden fingers, the distance that is in the pluggingdirection of the edge connector and that is between the reference lineand the first end of the golden finger for transmitting a power signalin the second row of golden fingers is greater than a distance that isin the plugging direction of the edge connector and that is between thereference line and a first end of a golden finger for transmitting acommunication signal in the second row of golden fingers, and thereference line is perpendicular to the plugging direction of the edgeconnector, and divides each golden finger in the second row of goldenfingers into two parts.

In the foregoing technical solution, in a process of powering on theplurality of golden fingers in the second row of golden fingers, thegrounded golden finger can be powered on before the golden finger fortransmitting a power signal, and the golden finger for transmitting apower signal can be powered on before the golden finger for transmittinga communication signal, and in a power-off process, the golden fingerfor transmitting a communication signal can be powered off before thegolden finger for transmitting a power signal, and the golden finger fortransmitting a power signal can be powered off before the groundedgolden finger. In the foregoing technical solution, the grounded goldenfinger is the first to be powered on and the last to be powered off, toensure security of the second row of golden fingers, and avoid life spanshortening of the edge connector caused by a problem such as surgeovershoot. The golden finger for transmitting a power signal is poweredon before the golden finger for transmitting a communication signal, andis powered off after the golden finger for transmitting a communicationsignal to ensure that the golden finger for transmitting a communicationsignal can integrally transmit a signal, and avoid a problem that asignal transmitted on the golden finger for transmitting a communicationsignal is lost because the golden finger fails to be powered on in time.

With reference to any one of the first aspect or the first to the fifthpossible implementations of the first aspect, in a sixth possibleimplementation, a quantity of golden fingers included in the second rowof golden fingers is the same as a quantity of golden fingers includedin the first row of golden fingers, and in the plugging direction of theedge connector, each golden finger in the first row of golden fingers isin a same column as a golden finger in the second row of golden fingers,and two golden fingers in a same column are configured to transmitsignals of a same type.

In a process in which the edge connector is plugged into the femaleconnector, a contact spring plate in contact with a golden finger in thesecond row of golden fingers is first in contact with another goldenfinger in a same column as the golden finger, and then slides over theother golden finger while keeping in touch with the other golden finger.It is ensured that two golden fingers in a same column can transmitsignals of a same type to avoid that signals transmitted on the goldenfingers in the edge connector are disordered in the process in which theedge connector is plugged into the female connector.

With reference to the sixth possible implementation of the first aspect,in a seventh possible implementation, two golden fingers in a samecolumn that are both for grounding are connected. Therefore, atechnology difficulty in manufacturing the edge connector can be reducedwhile ensuring that the edge connector works normally.

With reference to the sixth or the seventh possible implementation ofthe first aspect, in an eighth possible implementation, in the pluralityof golden fingers in the first row of golden fingers and the pluralityof golden fingers in the second row of golden fingers, central lines,separately in the plugging direction of the edge connector, of two endparts that are of two golden fingers in a same column and that areadjacent to each other substantially overlap. Therefore, golden fingersin a same column each can be in good contact with a correspondingcontact spring plate to produce a relatively good signal transmissioneffect.

With reference to any one of the first aspect or the first to the eighthpossible implementations of the first aspect, in a ninth possibleimplementation, second ends of all the golden fingers in the second rowof golden fingers are aligned with each other, and the second end ofeach golden finger in the second row of golden fingers is the other endopposite to an end that is of the golden finger in the second row ofgolden fingers and that is close to the plugging end. In this technicalsolution, because the second ends of all the golden fingers in thesecond row of golden fingers are aligned with each other, the base ofthe edge connector is divided into relatively regular areas by thesecond row of golden fingers, thereby facilitating arrangement ofanother component on the base.

With reference to any one of the first aspect or the first to the ninthpossible implementations of the first aspect, in a tenth possibleimplementation, a minimum spacing between the first row of goldenfingers and the second row of golden fingers meets a requirement of anelectrical short circuit, and a maximum spacing is less than or equal toa length of a shortest golden finger in the edge connector to helpreduce a surface area, occupied by the first row of golden fingers andthe second row of golden fingers, of the base of the edge connector,thereby further facilitating miniaturization of the edge connector.

According to a second aspect, this application provides a circuit board,including a circuit and the edge connector according to any one of thefirst aspect or the first to the tenth possible implementations of thefirst aspect, the edge connector is at an edge of the circuit board, andeach golden finger in the edge connector is connected to the circuit.Compared with an edge connector in the other approaches, the edgeconnector used in the circuit board can avoid problems such as surgeovershoot and current backflow caused when golden fingers in a same roware simultaneously powered on or simultaneously powered off. Therefore,the circuit board in this application can have relatively good securityperformance due to relatively good security performance of the used edgeconnector.

With reference to the second aspect, in a first possible implementation,the circuit board further includes a cable layer, the cable layer is atan inner layer of the circuit board, and the circuit is disposed at thecable layer. Because the cable layer is at the inner layer of thecircuit board, and the circuit is disposed at the cable layer, thecircuit transmits a signal at a relatively fast rate, thereby helpingincrease a rate of transmitting a signal between the edge connector andthe circuit in the circuit board.

According to a third aspect, this application provides a connectorcomponent, including a female connector and the edge connector accordingto any one of the first aspect or the first to the tenth possibleimplementations of the first aspect, where the edge connector is pluggedinto the female connector to connect to the female connector, the femaleconnector includes a first row of contact spring plates and a second rowof contact spring plates, the first row of contact spring platesincludes a plurality of first contact spring plates, and the second rowof contact spring plates includes a plurality of second contact springplates, each first contact spring plate in the first row of contactspring plates is configured to be in contact with a golden finger in afirst row of golden fingers, and each second contact spring plate in thesecond row of contact spring plates is configured to be in contact witha golden finger in a second row of golden fingers.

Compared with an edge connector in the other approaches, the edgeconnector used in the connector component can avoid problems such assurge overshoot and current backflow caused when golden fingers in asame row are simultaneously powered on or simultaneously powered off.Therefore, the connector component in this application can haverelatively good security performance due to relatively good securityperformance of the used edge connector.

With reference to the third aspect, in a first possible implementation,a spacing between the first row of contact spring plates and the secondrow of contact spring plates is L₁, a maximum distance between a secondend of each golden finger in the first row of golden fingers and a firstend of a golden finger that is in the second row of golden fingers andthat is in a same column as the golden finger in the first row of goldenfingers is S₁, and a maximum distance between a first end of each goldenfinger in the first row of golden fingers and a second end of a goldenfinger that is in the second row of golden fingers and that is in a samecolumn as the golden finger in the first row of golden fingers is S₂,where L₁, S₁, and S₂ each are an integer greater than 0, and L₁ is 1greater than or equal to S₁ and less than or equal to S₂.

A second end of each golden finger in the second row of golden fingersis the other end opposite to an end that is of the golden finger in thesecond row of golden fingers and that is close to the plugging end. Thisimplementation is used to ensure that each contact spring plate in thefirst row of contact spring plates and each contact spring plate in thesecond row of contact spring plates each can be in contact with acorresponding golden finger.

With reference to the third aspect or the first possible implementationof the third aspect, in a second possible implementation, positions atwhich the plurality of first contact spring plates are in contact withthe golden fingers are in a straight line perpendicular to a pluggingdirection of the edge connector. Therefore, a machining technology canbe simplified and production efficiency can be improved.

With reference to any one of the third aspect, in a third possibleimplementation, positions at which the plurality of second contactspring plates are in contact with the golden fingers are in a straightline perpendicular to a plugging direction of the edge connector.Therefore, the machining technology can be simplified and the productionefficiency can be improved.

With reference to any one of the third aspect or the first to the thirdpossible implementations of the third aspect, in a fourth possibleimplementation, each first contact spring plate is in a same column as asecond contact spring plate, and the first contact spring plate and thesecond contact spring plate in the same column transmit signals of asame type. In a process in which the edge connector is plugged into thefemale connector, before each second contact spring plate is in contactwith a golden finger in the second row of golden fingers, the secondcontact spring plate is first in contact with a golden finger in thefirst row of golden fingers, and the second contact spring plate slidesover the golden finger in the first row of golden fingers while keepingin contact with the golden finger, and is then in contact with thegolden finger in the second row of golden fingers. Therefore, if thesecond contact spring plate and the first contact spring plate in thesame column transmit signals of different types, in the process in whichthe edge connector is plugged into the female connector, signaltransmission on the golden finger in the first row of golden fingers isdisordered because a type of an actually received signal is differentfrom a type of a signal that ought to be received.

According to a fourth aspect, this application further provides acommunications device, including the circuit board and the femaleconnector according to the second aspect or the first possibleimplementation of the second aspect, and the edge connector on thecircuit board is plugged into the female connector to connect to thefemale connector.

Compared with a circuit board in the other approaches, the circuit boardused in the communications device has better security performance, andtherefore the communications device in this application can also haverelatively good security performance.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic structural diagram of a connector componentaccording to this application;

FIG. 2 is a schematic structural diagram of an edge connector accordingto this application;

FIG. 3 is a schematic structural diagram of a female connector in theconnector component shown in FIG. 1;

FIG. 4 is a schematic diagram of a process in which an edge connector isplugged into a female connector according to this application;

FIG. 5 is a schematic structural diagram of a circuit board according tothis application; and

FIG. 6 is a schematic structural diagram of a communications deviceaccording to this application.

DESCRIPTION OF EMBODIMENTS

The following clearly describes the technical solutions in thisapplication with reference to the accompanying drawings in thisapplication. Described embodiments are merely a part rather than all ofthe embodiments of the present disclosure. All other embodimentsobtained by a person of ordinary skill in the art based on theembodiments of the present disclosure without creative efforts shallfall within the protection scope of the present disclosure.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of aconnector component. The connector component may be applied to aspecific scenario such as a communication cabinet. The connectorcomponent includes an edge connector 100 and a female connector 110. Theedge connector 100 includes a first row of golden fingers 101 and asecond row of golden fingers 102. The first row of golden fingers 101 isadjacent to a plugging end 103 of the edge connector, and the second rowof golden fingers 102 is adjacent to the first row of golden fingers101. The female connector 110 includes a first row of contact springplates 111 and a second row of contact spring plates 112. The second rowof contact spring plates 112 is adjacent to an opening end 113 of thefemale connector, and the first row of contact spring plates 111 isadjacent to the second row of contact spring plates 112. Further, eachgolden finger in the first row of golden fingers 101 is in contact witha contact spring plate in the first row of contact spring plates 111,and each golden finger in the second row of golden fingers 102 is incontact with a contact spring plate in the second row of contact springplates 112. Compared with an edge connector in other approaches, theedge connector 100 used in the connector component can avoid problemssuch as surge overshoot and current backflow caused when golden fingersin a same row are simultaneously powered on or simultaneously poweredoff. Therefore, the connector component in this application can haverelatively good security performance due to relatively good securityperformance of the used edge connector 100. As for a reason why the edgeconnector 100 used in the connector component can avoid problems such assurge overshoot and current backflow caused when golden fingers in asame row are simultaneously powered on or simultaneously powered off,detailed descriptions are provided subsequently.

It should be noted that in the connector component provided in thisapplication, the edge connector 100 is plugged into/out of the femaleconnector 110 through hot plug.

Referring to FIG. 1 and FIG. 3, it is easy to learn that the first rowof contact spring plates 111 includes a plurality of first contactspring plates, and the second row of contact spring plates 112 includesa plurality of second contact spring plates. It should be noted thatpositions at which the plurality of first contact spring plates are incontact with the golden fingers may be in a straight line perpendicularto a plug-in direction of the edge connector 100.

In another implementation of this application, positions at which theplurality of second contact spring plates are in contact with the goldenfingers may also be in the straight line perpendicular to the plug-indirection of the edge connector 100.

It should be noted that neither a straight line formed by the pluralityof first contact spring plates nor a straight line formed by theplurality of second contact spring plates is necessarily a strictstraight line, or in other words, may be a broken line. The straightline may be bent due to an unavoidable error. The unavoidable error maybe an error in technology manufacturing or an error in designing. Abending degree of the broken line needs to be acceptable to a personskilled in the art.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of an edgeconnector 100 according to this application. It should be noted that theedge connector 100 may be disposed at an edge of a circuit board and beintegrated with the circuit board, or may be disposed at an end of amemory card and be integrated with the memory card, or may be disposedat an end of a cable and be integrated with the cable. The edgeconnector 100 may be used in the connector component shown in FIG. 1,and is configured to be plugged into the female connector 110, toimplement signal transmission with the female connector 110.

As shown in FIG. 2, the edge connector 100 includes a first row ofgolden fingers 101 and a second row of golden fingers 102. The first rowof golden fingers 101 is adjacent to a plugging end 103 of the edgeconnector, and the second row of golden fingers 102 is adjacent to thefirst row of golden fingers 101. The first row of golden fingers 101includes a plurality of golden fingers, and the second row of goldenfingers 102 includes a plurality of golden fingers. In a pluggingdirection of the edge connector 100, each golden finger in the first rowof golden fingers 101 has a first end close to the plugging end 103 anda second end opposite to the first end. A first end of a grounded goldenfinger in the plurality of golden fingers in the first row of goldenfingers 101 is protruded from other golden fingers, and second ends oftwo or more than two golden fingers in the first row of golden fingers101 are not aligned with each other. A first end that is of a groundedgolden finger in the second row of golden fingers 102 and that is closeto the plugging end 103 in the plugging direction of the edge connector100 is protruded from other golden fingers.

It should be noted that in this application, golden fingers areclassified into a grounded golden finger, a golden finger fortransmitting a power signal, a golden finger for transmitting acommunication signal, a golden finger for transmitting another signal,and the like according to functions of signals transmitted by the goldenfingers. The golden finger for transmitting a power signal means that afunction of a signal transmitted by the golden finger is to power on theedge connector to work, and the golden finger for transmitting acommunication signal means that a function of a signal transmitted bythe golden finger is to enable the golden finger to transmit acommunication signal. Therefore, although the golden finger fortransmitting a communication signal substantially transmits anelectrical signal, a function of the electrical signal transmitted bythe golden finger for transmitting a communication signal is differentfrom a function of an electrical signal transmitted by the golden fingerfor transmitting a power signal. Therefore, in this application,according to functions of electrical signals transmitted by goldenfingers, the golden fingers are classified into a golden finger fortransmitting a power signal and a golden finger for transmitting acommunication signal. It should be further noted that a type of a signaltransmitted by the golden finger for transmitting a communication signalmay be a control signal, a high-speed signal, a clock signal, or thelike.

In an implementation of this application, the edge connector 100 mayfurther include a base. The first row of golden fingers 101 and thesecond row of golden fingers 102 may be disposed in parallel on asurface of the base. Each golden finger in the first row of goldenfingers 101 and each golden finger in the second row of golden fingers102 may be electrically connected to a circuit inside the base.

It should be noted that if the base includes a first surface and asecond surface that is opposite to the first surface, the first row ofgolden fingers 101 and the second row of golden fingers 102 may bedisposed in parallel on the first surface of the base, and when thesecond surface includes a golden finger for transmitting a power signal,the first row of golden fingers 101 and the second row of golden fingers102 each may include at least a grounded golden finger and a goldenfinger for transmitting a communication signal. Certainly, the first rowof golden fingers may further include a golden finger connected to apower supply. Similarly, the second row of golden fingers may furtherinclude a golden finger connected to a power supply.

It should be noted that because a part that forms the circuit mayalternatively be a cable in addition to an element such as a capacitor,a resistor, or an inductor, during specific implementation, that eachgolden finger in the first row of golden fingers 101 and each goldenfinger in the second row of golden fingers 102 may be electricallyconnected to the circuit inside the base means that the golden fingermay be directly electrically connected to the cable or the element.

It should be noted that, as shown in FIG. 2, FIG. 2 shows respectiveextension directions of a row and a column described in thisapplication. In this application, the row and the column are a pair ofrelative concepts. The extension directions of the row and the columnare perpendicular to each other. It should be noted that, duringtechnology design and manufacturing, due to an error or a technologylimitation, the row and the column in this application may not bestrictly perpendicular to each other, but instead, an included anglebetween the row and the column is approximately 90° rather than 90°.However, the included angle between the row and the column needs to beacceptable to a person skilled in the art, and the included angle shouldnot affect achievement of this application.

In another implementation of this application, the plurality of goldenfingers included in the first row of golden fingers 101 may be disposedin parallel at intervals.

In still another implementation of this application, the plurality ofgolden fingers included in the second row of golden fingers 102 may alsobe disposed in parallel at intervals.

It should be noted that the first row of golden fingers 101 and thesecond row of golden fingers 102 each may include an undefined goldenfinger. The undefined golden finger means that one end of the goldenfinger is in contact with a contact spring plate but the other end isnot connected to the circuit. Consequently, after receiving a signaltransmitted from the contact spring plate, the golden finger fails totransmit the signal to another component through the circuit.

It may be learned from the foregoing descriptions that, that “a firstend of a grounded golden finger in the first row of golden fingers 101is protruded from other golden fingers” is to ensure that first ends ofthe plurality of golden fingers in the first row of golden fingers 101are not aligned with each other, and that “a first end that is of agrounded golden finger in the second row of golden fingers 102 and thatis close to the plugging end 103 in the plugging direction of the edgeconnector 100 is protruded from other golden fingers” is to ensure thatfirst ends of the plurality of golden fingers in the second row ofgolden fingers 102 are not aligned with each other. In this application,the first ends of the plurality of golden fingers in the first row ofgolden fingers 101 are set to be not aligned with each other, secondends of the plurality of golden fingers in the first row of goldenfingers 101 are set to be not aligned with each other, and the firstends of the plurality of golden fingers in the second row of goldenfingers 102 are set to be not aligned with each other to avoid apossible problem, in a process in which the edge connector 100 isplugged into/out of the female connector 110 through hot plug, ofsimultaneous power-on or power-off of any row of the first row of goldenfingers 101 and the second row of golden fingers 102, and further avoidproblems such as surge overshoot and current backflow caused when goldenfingers in a same row are simultaneously powered on or powered off suchthat a life span of the edge connector 100 can be prolonged to someextent.

In an implementation of this application, a second end of the groundedgolden finger in the first row of golden fingers 101 is protruded fromthe other golden fingers.

A person skilled in the art should know that one row of golden fingersincludes at least a grounded golden finger and a golden finger fortransmitting a communication signal. However, a grounded golden fingeris the longest among all the golden fingers included in the edgeconnector. If the row of golden fingers further includes a golden fingerfor transmitting a power signal, a length of the grounded golden fingeris greater than a length of the golden finger for transmitting a powersignal, and the length of the golden finger for transmitting a powersignal is greater than a length of the golden finger for transmitting acommunication signal.

A person skilled in the art should further know that even though bothtwo golden fingers are grounded or are for transmitting a power signalor are for transmitting a communication signal, lengths of the goldenfingers are not necessarily completely equal, or in other words, lengthsof the golden fingers are substantially equal. The “substantially equal”should be determined based on a technical feature that is understood bya person skilled in the art and that can achieve the inventive objectiveof the present disclosure.

It may be learned from the foregoing descriptions that the other goldenfingers are golden fingers other than the grounded golden finger in thefirst row of golden fingers 101, and may include only a golden fingerfor transmitting a communication signal, or may include both a goldenfinger for transmitting a communication signal and a golden finger fortransmitting a power signal. The grounded golden finger is the longestcompared with the other golden fingers in the first row of goldenfingers 101. Therefore, the foregoing limitation helps reduce a surfacearea, occupied by the first row of golden fingers 101, of the base ofthe edge connector 100, thereby facilitating miniaturization of the edgeconnector 100.

In another implementation of this application, as shown in FIG. 2, inaddition to the grounded golden finger, the first row of golden fingers101 further includes a golden finger for transmitting a power signal. Adistance that is in the plugging direction of the edge connector 100 andthat is between a reference line and the second end of the groundedgolden finger in the first row of golden fingers 101 is greater than adistance that is in the plugging direction of the edge connector 100 andthat is between the reference line and a second end of the golden fingerfor transmitting a power signal in the first row of golden fingers 101.The distance that is in the plugging direction of the edge connector 100and that is between the reference line and the second end of the goldenfinger for transmitting a power signal in the first row of goldenfingers 101 is greater than or equal to a distance that is in theplugging direction of the edge connector 100 and that is between thereference line and a second end of a golden finger for transmitting acommunication signal in the first row of golden fingers 101. Thereference line is perpendicular to the plugging direction of the edgeconnector 100, and divides each golden finger in the first row of goldenfingers 101 into two parts.

It should be noted that, that “the reference line divides each goldenfinger in the first row of golden fingers 101 into two parts” means thata length of a part, on each side of the reference line, of each goldenfinger in the first row of golden fingers 101 is greater than 0 in theplugging direction of the edge connector 100.

As described above, usually, a length of the grounded golden finger inthe plugging direction of the edge connector 100 is greater than alength, in the plugging direction of the edge connector 100, of thegolden finger for transmitting a power signal. The length, in theplugging direction of the edge connector 100, of the golden finger fortransmitting a power signal is greater than a length, in the pluggingdirection of the edge connector 100, of the golden finger fortransmitting a communication signal. Therefore, in this application, itis ensured that the distance between the reference line and the secondend of the grounded golden finger in the first row of golden fingers 101is greater than the distance between the reference line and the secondend of the golden finger for transmitting a power signal in the firstrow of golden fingers 101, and that the distance between the referenceline and the second end of the golden finger for transmitting a powersignal in the first row of golden fingers 101 is greater than thedistance between the reference line and the second end of the goldenfinger for transmitting a communication signal in the first row ofgolden fingers 101 to reduce a surface area, occupied by the first rowof golden fingers 101, of the base of the edge connector 100, therebyfacilitating miniaturization of the edge connector 100.

In still another implementation of this application, as shown in FIG. 2,a distance that is in the plugging direction of the edge connector 100and that is between the reference line and the first end of the groundedgolden finger in the first row of golden fingers 101 is greater than adistance that is in the plugging direction of the edge connector 100 andthat is between the reference line and a first end of the golden fingerfor transmitting a power signal in the first row of golden fingers 101.

The distance that is in the plugging direction of the edge connector 100and that is between the reference line and the first end of the goldenfinger for transmitting a power signal in the first row of goldenfingers 101 is greater than a distance that is in the plugging directionof the edge connector 100 and that is between the reference line and afirst end of the golden finger for transmitting a communication signalin the first row of golden fingers 101.

In the foregoing technical solution, in a process of powering on theplurality of golden fingers in the first row of golden fingers, thegrounded golden finger can be powered on before the golden finger fortransmitting a power signal, and the golden finger for transmitting apower signal can be powered on before the golden finger for transmittinga communication signal, and in a power-off process, the golden fingerfor transmitting a communication signal can be powered off before thegolden finger for transmitting a power signal, and the golden finger fortransmitting a power signal can be powered off before the groundedgolden finger. In the foregoing technical solution, the grounded goldenfinger is the first to be powered on and the last to be powered off, toensure security of the first row of golden fingers, and avoid life spanshortening of the edge connector caused by a problem such as surgeovershoot. The golden finger for transmitting a power signal is poweredon before the golden finger for transmitting a communication signal, andis powered off after the golden finger for transmitting a communicationsignal, to ensure that the golden finger for transmitting acommunication signal can integrally transmit a signal, and avoid aproblem that a signal transmitted on the golden finger for transmittinga communication signal is lost because the golden finger fails to bepowered on in time.

Further referring to FIG. 2, in still another implementation of thisapplication, the reference line divides a shortest golden finger in thefirst row of golden fingers 101 into two parts of a same length in theplugging direction of the edge connector 100. It should be understoodthat, the “same” herein should be “substantially the same”. Strictly,the two parts may have different lengths, but a length differencebetween the two parts should not be excessively large. A fluctuationrange of the length difference between the two parts needs to be subjectto understanding of a person skilled in the art. This is not limitedherein. In this implementation, the surface area, occupied by the firstrow of golden fingers, of the base of the edge connector can be furtherreduced, thereby facilitating miniaturization of the edge connector.

In still another implementation of this application, as shown in FIG. 2,the second row of golden fingers 102 further includes a golden fingerfor transmitting a power signal. A distance that is in the pluggingdirection of the edge connector 100 and that is between a reference lineand the first end of the grounded golden finger in the second row ofgolden fingers 102 is greater than a distance that is in the pluggingdirection of the edge connector 100 and that is between the referenceline and a first end of the golden finger for transmitting a powersignal in the second row of golden fingers 102. The distance that is inthe plugging direction of the edge connector 100 and that is between thereference line and the first end of the golden finger for transmitting apower signal in the second row of golden fingers 102 is greater than adistance that is in the plugging direction of the edge connector 100 andthat is between the reference line and a first end of a golden fingerfor transmitting a communication signal in the second row of goldenfingers 102. The reference line is perpendicular to the pluggingdirection of the edge connector 100, and divides each golden finger inthe second row of golden fingers 102 into two parts.

It should be noted that, that “the reference line divides each goldenfinger in the second row of golden fingers 102 into two parts” meansthat a length of a part, on each side of the reference line, of eachgolden finger in the second row of golden fingers 102 is greater than 0in the plugging direction of the edge connector 100.

In the foregoing technical solution, in a process of powering on theplurality of golden fingers in the second row of golden fingers 102, thegrounded golden finger can be powered on before the golden finger fortransmitting a power signal, and the golden finger for transmitting apower signal can be powered on before the golden finger for transmittinga communication signal, and in a power-off process, the golden fingerfor transmitting a communication signal can be powered off before thegolden finger for transmitting a power signal, and the golden finger fortransmitting a power signal can be powered off before the groundedgolden finger. In the foregoing technical solution, the grounded goldenfinger is the first to be powered on and the last to be powered off, toensure security of the second row of golden fingers 102, and avoid lifespan shortening of the edge connector 100 caused by a problem such assurge overshoot. The golden finger for transmitting a power signal ispowered on before the golden finger for transmitting a communicationsignal, and is powered off after the golden finger for transmitting acommunication signal, to ensure that the golden finger for transmittinga communication signal can integrally transmit a signal, and avoid aproblem that a signal transmitted on the golden finger for transmittinga communication signal is lost because the golden finger fails to bepowered on in time.

In still another implementation of this application, as shown in FIG. 2,a quantity of golden fingers included in the second row of goldenfingers 102 is the same as a quantity of golden fingers included in thefirst row of golden fingers 101. In the plugging direction of the edgeconnector 100, each golden finger in the first row of golden fingers 101is in a same column as a golden finger in the second row of goldenfingers 102, and two golden fingers in a same column are configured totransmit signals of a same type. It should be noted that a columnextension direction is shown in FIG. 2.

Referring to FIG. 1, in a process in which the edge connector 100 isplugged into the female connector 110, a contact spring plate in contactwith a golden finger in the second row of golden fingers 102 is first incontact with another golden finger in a same column as the goldenfinger, and then slides over the other golden finger while keeping incontact with the other golden finger. It is ensured that two goldenfingers in a same column can transmit signals of a same type, to avoidthat signals transmitted on the golden fingers in the edge connector aredisordered in the process in which the edge connector is plugged intothe female connector.

Referring to FIG. 4, a column of golden fingers and a correspondingcolumn of contact spring plates are used as examples in FIG. 4 todescribe a contact relationship between a contact spring plate and agolden finger in the process in which the edge connector 100 is pluggedinto the female connector 110. Further, in the process in which the edgeconnector 100 is plugged into the female connector 110, a second contactspring plate A2 in the female connector 110 is finally in contact with agolden finger B2 in the second row of golden fingers 102 of the edgeconnector 100, and a first contact spring plate A1 in the femaleconnector 110 is finally in contact with a golden finger B1 in the firstrow of golden fingers 101 of the edge connector 100. However, withreference to FIG. 4, it is easy to see that before the second contactspring plate A2 is in contact with the golden finger B2, the secondcontact spring plate A2 is first in contact with the golden finger B1,slides over the golden finger B1 while keeping in contact with thegolden finger B1, and is then in contact with the golden finger B2. Thegolden finger B1 is finally in contact with the contact spring plate A1.Therefore, if a type of a signal transmitted on the contact spring plateA2 is different from a type of a signal transmitted on the contactspring plate A1, when the contact spring plate A2 is in contact with thegolden finger B1, signal transmission on the golden finger B1 isdisordered because a type of a signal actually transmitted on the goldenfinger B1 is different from a type of a signal that ought to betransmitted on the golden finger B1.

With reference to the foregoing analysis, it may be learned that for thefemale connector, each first contact spring plate is in a same column asa second contact spring plate, and the first contact spring plate andthe second contact spring plate in the same column also need to transmitsignals of a same type.

This is because in the process in which the edge connector 100 isplugged into the female connector 110, before each second contact springplate is in contact with a golden finger in the second row of goldenfingers, the second contact spring plate is first in contact with agolden finger in the first row of golden fingers 101, and the secondcontact spring plate slides over the golden finger in the first row ofgolden fingers 101 while keeping in contact with the golden finger, andis then in contact with the golden finger in the second row of goldenfingers 102. Therefore, if the second contact spring plate and the firstcontact spring plate in the same column transmit signals of differenttypes, in the process in which the edge connector 100 is plugged intothe female connector 110, signal transmission on the golden finger inthe first row of golden fingers 101 is disordered because a type of anactually received signal is different from a type of a signal that oughtto be received.

In still another specific implementation of this application, two goldenfingers in a same column that are both for grounding are connected. Suchdesign can reduce a technology difficulty in manufacturing the edgeconnector 100 while ensuring that the edge connector 100 works normally.

In still another specific implementation of this application, in theplurality of golden fingers in the first row of golden fingers 101 andthe plurality of golden fingers in the second row of golden fingers 102,central lines, separately in the plugging direction of the edgeconnector 100, of two end parts that are of two golden fingers in a samecolumn and that are adjacent to each other substantially overlap.Therefore, golden fingers in a same column each can be in good contactwith a corresponding contact spring plate, to produce a relatively goodsignal transmission effect.

It should be noted that the essential overlapping means that the centrallines, separately in the plugging direction of the edge connector 100,of the two end parts that are of the two golden fingers in the samecolumn and that are adjacent to each other may not completely overlap,or in other words, a spacing between the two central lines may begreater than 0, or in other words, a spacing between the two centrallines may fall within a specific range, and the specific range needs tobe subject to understanding of a person skilled in the art. Details arenot described herein.

In still another specific implementation of this application, secondends of all the golden fingers in the second row of golden fingers 102are aligned with each other, and the second end of each golden finger inthe second row of golden fingers 102 is the other end opposite to an endthat is of the golden finger in the second row of golden fingers 102 andthat is close to the plugging end 103. In this technical solution,because the second ends of all the golden fingers in the second row ofgolden fingers 102 are aligned with each other, the base of the edgeconnector 100 is divided into relatively regular areas by the second rowof golden fingers 102, thereby facilitating arrangement of anothercomponent on the base.

It should be noted that the alignment means that the second ends of allthe golden fingers in the second row of golden fingers 102 aresubstantially in a same straight line perpendicular to the pluggingdirection of the edge connector 100. It should be emphasized that, thatthe second ends of all the golden fingers in the second row of goldenfingers 102 are substantially in the same straight line means that thesecond ends of all the golden fingers in the second row of goldenfingers 102 may not be completely in a same straight line, or in otherwords, the second ends of all the golden fingers in the second row ofgolden fingers 102 may form a curve, but a bending degree of the curveis limited. Limitation on the bending degree of the curve needs to besubject to understanding of a person skilled in the art. Details are notdescribed herein.

In still another specific implementation of this application, a minimumspacing between the first row of golden fingers 101 and the second rowof golden fingers 102 meets a requirement of an electrical shortcircuit, and a maximum spacing is less than or equal to a length of ashortest golden finger in the edge connector 100 to help reduce asurface area, occupied by the first row of golden fingers and the secondrow of golden fingers, of the base of the edge connector, therebyfurther facilitating miniaturization of the edge connector.

It should be noted that there is assembly tolerance between the edgeconnector 100 and the female connector 110 in the process in which theedge connector 100 is plugged into the female connector 110. Therefore,during setting of the minimum spacing between the first row of goldenfingers 101 and the second row of golden fingers 102, not only that thegolden finger in the first row of golden fingers 101 is not in contactwith the golden finger in the second row of golden fingers 102 needs tobe considered, but also the assembly tolerance needs to be considered,to avoid an electrical short circuit caused by an excessively smallspacing between the first row of golden fingers 101 and the second rowof golden fingers 102 in the process in which the edge connector 100 isplugged into the female connector 110.

In another embodiment of the present disclosure, the edge connector 100shown in FIG. 2 may include three or more than three rows of goldenfingers, and the three or more than three rows of golden fingers arearranged in the plugging direction of the edge connector 100 in units ofa row. The three or more than three rows of golden fingers include onerow of far-end golden fingers and two or more than two rows of near-endgolden fingers. The one row of far-end golden fingers is a row of goldenfingers that is the farthest from the plugging end 103 of the edgeconnector among the three or more than three rows of golden fingers. Thetwo or more than two rows of near-end golden fingers include one row ofnear-end golden fingers that is adjacent to the plugging end 103 of theedge connector, and further include one row of near-end golden fingersthat is adjacent to the one row of far-end golden fingers.

It should be noted that when the edge connector 100 includes three ormore than three rows of golden fingers, other rows of near-end goldenfingers other than one row of far-end golden fingers that is thefarthest from the plugging end 103 of the edge connector may be designedbased on a structure of the first row of golden fingers 101.

It should be further noted that when the edge connector 100 includesthree or more than three rows of golden fingers, for any golden fingerin any row of golden fingers, in the plugging direction of the edgeconnector 100, each of other rows of golden fingers includes a goldenfinger that is in a same column as the golden finger. Types of signalstransmitted on three or more than three golden fingers that are in asame column in the plugging direction of the edge connector 100 are thesame. For example, the three or more than three golden fingers in thesame column are all grounded golden fingers, or are all golden fingersfor transmitting a power signal, or are all golden fingers fortransmitting a communication signal.

Referring to FIG. 1 and FIG. 3, with reference to the edge connector 100in the foregoing embodiment, in the connector component provided in thisapplication, a spacing between the first row of contact spring plates111 and the second row of contact spring plates 112 is L₁, a maximumdistance between a second end of each golden finger in the first row ofgolden fingers 101 and a first end of a golden finger that is in thesecond row of golden fingers 102 and that is in a same column as thegolden finger in the first row of golden fingers 101 is S₁, and amaximum distance between a first end of each golden finger in the firstrow of golden fingers 101 and a second end of a golden finger that is inthe second row of golden fingers 102 and that is in a same column as thegolden finger in the first row of golden fingers 101 is S₂, where L₁,S₁, and S₂ each are an integer greater than 0, and L₁ is 1 greater thanor equal to S₁ and less than or equal to S₂. The second end of eachgolden finger in the second row of golden fingers 102 is the other endopposite to an end that is of the golden finger in the second row ofgolden fingers 102 and that is close to the plugging end 103. Thissolution is to ensure that each contact spring plate in the first row ofcontact spring plates 111 and each contact spring plate in the secondrow of contact spring plates 112 each can be in contact with acorresponding golden finger.

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of acircuit board 200 according to this application. It should be noted thatthe circuit board 200 in this application is not a bare board, but acomponent formed after another component such as a chip, a connector, ora filter has been integrated into a bare board, and the component isreferred to as a circuit board in this application. It should be furthernoted that the circuit board 200 may be applied to an optical module, ormay be applied to an electrical module. Further, the circuit board 200includes an edge connector 210 and a circuit 220, and each golden fingerin the edge connector 210 is connected to the circuit 220. It should benoted that the edge connector 210 used in this application may be anyedge connector in the foregoing embodiment.

In an implementation of this application, the edge connector 210 may bedisposed at an edge of the circuit board 200 and be integrated with thecircuit board 200.

It should be noted that because a part that forms the circuit 220 mayalternatively be a cable in addition to an element such as a capacitor,a resistor, or an inductor, during specific implementation, that eachgolden finger in the edge connector 210 may be connected to the circuit220 means that the golden finger may be directly electrically connectedto the cable or the element.

Compared with an edge connector in the other approaches, the edgeconnector 210 used in the circuit board 200 can avoid problems such assurge overshoot and current backflow caused when golden fingers in asame row are simultaneously powered on or simultaneously powered off.Therefore, the circuit board 200 in this application can have relativelygood security performance due to relatively good security performance ofthe used edge connector 210.

In another implementation of this application, the circuit board 200further includes a cable layer. The cable layer is at an inner layer ofthe circuit board 200, and the circuit 220 is disposed at the cablelayer.

It should be noted that each golden finger for transmitting acommunication signal in the edge connector 210 can be connected to thecircuit 220 at the cable layer using a blind hole.

Because the cable layer is at the inner layer of the circuit board 200,and the circuit 220 is disposed at the cable layer, the circuittransmits a signal at a relatively fast rate, thereby helping increase arate of transmitting a signal between the edge connector and the circuitin the circuit board.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of acommunications device 300 according to this application. Thecommunications device 300 may be a communication cabinet or the like.Further, the communications device 300 includes a circuit board 310 anda female connector 320. An edge connector 311 on the circuit board 310is plugged into the female connector 320 to connect to the femaleconnector 320. For a specific structure of the circuit board 310, referto related descriptions of the circuit board 200 in the foregoingembodiment. Compared with a circuit board in the other approaches, thecircuit board 310 used in the communications device 300 has bettersecurity performance, and therefore the communications device 300 inthis application can also have relatively good security performance.

The foregoing descriptions merely disclose example embodiments of thepresent disclosure and definitely cannot be used to limit the scope ofthe claims of the present disclosure, a person of ordinary skill in theart can understand that all or some procedures for implementing theembodiments, and equivalent changes made based on the claims of thepresent disclosure still fall within the scope of the presentdisclosure.

What is claimed is:
 1. An edge connector, comprising: a base; a firstrow of golden fingers adjacent to a plugging end of the edge connectorand comprising a plurality of golden fingers disposed in parallel andisolated from each other; and a second row of golden fingers adjacent tothe first row of golden fingers and comprising another plurality ofgolden fingers disposed in parallel and isolated from each other, eachgolden finger in the first row of golden fingers having a first endproximate to the plugging end and a second end opposite to the first endin a plugging direction of the edge connector, a first end of a groundedgolden finger in the first row of golden fingers being protruded fromother golden fingers in the first row of golden fingers in the pluggingdirection of the edge connector, second ends of two or more than two ofthe golden fingers in the first row of golden fingers being not alignedwith each other in the plugging direction of the edge connector, and afirst end of a grounded golden finger in the second row of goldenfingers proximate to the plugging end in the plugging direction of theedge connector being protruded from other golden fingers in the secondrow of golden fingers.
 2. The edge connector of claim 1, wherein asecond end of the grounded golden finger in the first row of goldenfingers is protruded from the other golden fingers in the first row ofgolden fingers.
 3. The edge connector of claim 1, wherein the first rowof golden fingers further comprises a golden finger for transmitting apower signal, a second end of the grounded golden finger in the firstrow of golden fingers is protruded from a second end of the goldenfinger for transmitting the power signal in the first row of goldenfingers in the plugging direction of the edge connector, and the secondend of the golden finger for transmitting the power signal in the firstrow of golden fingers is protruded from a second end of a golden fingerfor transmitting a communication signal in the first row of goldenfingers in the plugging direction of the edge connector.
 4. The edgeconnector of claim 3, wherein the reference line is further configuredto divide a shortest golden finger in the first row of golden fingersinto two parts of a same length in the plugging direction of the edgeconnector.
 5. The edge connector of claim 1, wherein a quantity ofgolden fingers comprised in the second row of golden fingers is the sameas a quantity of golden fingers comprised in the first row of goldenfingers, in the plugging direction of the edge connector, each goldenfinger in the first row of golden fingers comprising in a same column asa golden finger in the second row of golden fingers, and two goldenfingers in a same column being configured to transmit signals of a sametype.
 6. The edge connector of claim 5, wherein two golden fingers in asame column for grounding are coupled.
 7. The edge connector of claim 5,wherein in the golden fingers in the first row of golden fingers and thegolden fingers in the second row of golden fingers, central lines,separately in the plugging direction of the edge connector, of two endparts of two golden fingers in a same column adjacent to each othersubstantially overlap.
 8. The edge connector of claim 1, wherein secondends of all the golden fingers in the second row of golden fingers arealigned with each other, and a second end of each golden finger in thesecond row of golden fingers comprising other end opposite to an end ofa golden finger in the second row of golden fingers proximate to theplugging end.
 9. The edge connector of claim 1, wherein a minimumspacing between the first row of golden fingers and the second row ofgolden fingers configured to meet a requirement of an electrical shortcircuit, and a maximum spacing between the first row of golden fingersand the second row of golden fingers being less than or equal to alength of a shortest golden finger in the edge connector.
 10. The edgeconnector of claim 1, wherein each golden finger is electrically coupledto a circuit inside the base.
 11. A circuit board, comprising: an edgeconnector at an edge of the circuit board that comprises golden fingers;and a circuit, each golden finger in the edge connector being coupled tothe circuit, and the edge connector comprising: a base; a first row ofgolden fingers adjacent to a plugging end of the edge connector andcomprising a plurality of golden fingers disposed in parallel andisolated from each other; and a second row of golden fingers adjacent tothe first row of golden fingers and comprising another plurality ofgolden fingers disposed in parallel and isolated from each other, thefirst row of golden fingers and the second row of golden fingers beingdisposed in parallel on a surface of the base, each golden finger in thefirst row of golden fingers having a first end proximate to the pluggingend and a second end opposite to the first end in a plugging directionof the edge connector, a first end of a grounded golden finger in thefirst row of golden fingers being protruded from other golden fingers inthe first row of golden fingers in the plugging direction of the edgeconnector, and second ends of two or more than two of the golden fingersin the first row of golden fingers being not aligned with each other inthe plugging direction of the edge connector, and a first end of agrounded golden finger in the second row of golden fingers proximate tothe plugging end in the plugging direction of the edge connector beingprotruded from other golden fingers in the second row of golden fingers.12. The circuit board of claim 11, further comprising a cable layer atan inner layer of the circuit board, and the circuit being disposed atthe cable layer.
 13. A connector component, comprising: a femaleconnector comprising: a first row of contact spring plates comprising aplurality of first contact spring plates, each first contact springplates in the first row of contact spring plates being configured to becoupled to a golden finger in a first row of golden fingers; and asecond row of contact spring plates comprising a plurality of secondcontact spring plates, each second contact spring plate in the secondrow of contact spring plates being configured to be coupled to a goldenfinger in a second row of golden fingers; and an edge connector pluggedinto the female connector to couple to the female connector andcomprising: a base; the first row of golden fingers adjacent to aplugging end of the edge connector and comprising a plurality of goldenfingers disposed in parallel and isolated from each other; and thesecond row of golden fingers adjacent to the first row of golden fingersand comprising a plurality of golden fingers disposed in parallel andisolated from each other, the first row of golden fingers and the secondrow of golden fingers being disposed in parallel on a surface of thebase, each golden finger in the first row of golden fingers having afirst end proximate to the plugging end and a second end opposite to thefirst end in a plugging direction of the edge connector, a first end ofa grounded golden finger in the first row of golden fingers beingprotruded from other golden fingers in the first row of golden fingersin the plugging direction of the edge connector, second ends of two ormore than two of the golden fingers in the first row of golden fingersbeing not aligned with each other in the plugging direction of the edgeconnector, and a first end of a grounded golden finger in the second rowof golden fingers proximate to the plugging end in the pluggingdirection of the edge connector being protruded from other goldenfingers in the second row of golden fingers.
 14. The connector componentof claim 13, wherein a spacing between the first row of contact springplates and the second row of contact spring plates comprising L₁, amaximum distance between a second end of each golden finger in the firstrow of golden fingers and a first end of a golden finger in the secondrow of golden fingers in a same column as the golden finger in the firstrow of golden fingers comprising S₁, and a maximum distance between afirst end of each golden finger in the first row of golden fingers and asecond end of a golden finger in the second row of golden fingers in asame column as the golden finger in the first row of golden fingerscomprising S₂, the L₁, the S₁, and the S₂ each comprising an integergreater than zero, the L₁ being greater than or equal to the S₁ and lessthan or equal to the S₂, and a second end of each golden finger in thesecond row of golden fingers comprising other end opposite to an end ofa golden finger in the second row of golden fingers proximate to theplugging end.
 15. The connector component of claim 13, wherein positionsat which the first contact spring plates coupled to the golden fingersare in a straight line perpendicular to the plugging direction of theedge connector.
 16. The connector component of claim 13, whereinpositions at which the second contact spring plates coupled to thegolden fingers are in a straight line perpendicular to the pluggingdirection of the edge connector.
 17. A communications device,comprising: a circuit board comprising: an edge connector at an edge ofthe circuit board that comprises golden fingers; and a circuit, eachgolden finger in the edge connector being coupled to the circuit, andthe edge connector comprising: a base; a first row of golden fingersadjacent to a plugging end of the edge connector and comprising aplurality of golden fingers disposed in parallel and isolated from eachother; and a second row of golden fingers adjacent to the first row ofgolden fingers and comprising another plurality of golden fingersdisposed in parallel and isolated from each other, the first row ofgolden fingers and the second row of golden fingers being disposed inparallel on a surface of the base, in a plugging direction of the edgeconnector, each golden finger in the first row of golden fingers havinga first end proximate to the plugging end and a second end opposite tothe first end in a plugging direction of the edge connector, a first endof a grounded golden finger in the first row of golden fingers beingprotruded from other golden fingers in the first row of golden fingersin the plugging direction of the edge connector, second ends of two ormore than two of the golden fingers in the first row of golden fingersbeing not aligned with each other in the plugging direction of the edgeconnector, and a first end of a grounded golden finger in the second rowof golden fingers proximate to the plugging end in the pluggingdirection of the edge connector being protruded from other goldenfingers in the second row of golden fingers; and a female connector, theedge connector on the circuit board being plugged into the femaleconnector to couple to the female connector.